By becoming a ShopStyle Member you get the additional benefit of creating a Rakuten Account. The ShopStyle Cash Back program is powered by Rakuten. This means that Rakuten is tracking your transactions to determine how much money you've earned back, and then delivering your money accordingly. When you use your email address to sign up for ShopStyle membership and enable Cash Back, you’re simultaneously creating a Rakuten account using the same address. As Rakuten tracks your Cash Back offers, they’ll send emails to keep you updated.